<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .rect {
            display: flex;
            width: 400px;
            height: 200px;
            background-color: #e45757;
        }

        .blue {
            width: 100px;
            height: 100px;
            background: blue;
        }
    </style>
</head>

<body>
    <script src="../js/vue.js"></script>
    <div id="app">
        <div class="rect" v-on:click.self="alertRed">
            <div class="blue" v-on:click="alertBlue">我是蓝色区域</div>
        </div>
    </div>
    
    <script>
        let vm = new Vue({
            el: "#app",
            data: {},
            methods: {
                alertBlue: function () {
                    console.log("blue");
                },
                alertRed: function () {
                    console.log("red");
                }
            }
        })
    </script>
</body>

</html>